Controller for dental handpiece



FIG. 1 is a front elevation of a controller for dental handpiece;

FIG. 2 is a rear elevation thereof;

FIG. 3 is a right side elevation thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a reduced perspective view thereof.

Portions of the dental handpiece shown in broken lines form no part of the claimed design. 

The ornamental design for a controller for dental handpiece, as shown and described. 